多径向涡形风控制岩巷综掘面粉尘污染分析

发布时间：2018-06-29 21:24

本文选题：多径向涡形风 + 岩巷综掘面　；参考：《应用基础与工程科学学报》2017年01期

【摘要】：针对岩巷综掘面粉尘质量浓度高且难以控制的难题,利用数值模拟与现场测试相结合的手段分析了多径向涡形风控制岩巷综掘面粉尘污染规律.结果表明:多径向涡形风应用后,压风量、压抽比越小,越利于形成轴向指向迎头流动且风速均匀的控尘风幕;压风量越大,压抽比越小,50mg/m3以上粉尘扩散距离越小,并得出了随压风量、压抽比变化的函数关系;压抽比为0.75时,形成的控尘风幕较优,高质量浓度粉尘扩散距离为3.4m,掘进机司机处粉尘质量浓度为19.6mg/m3,且易于现场应用.现场测试与数值模拟结果基本一致,应用多径向涡形风且压抽比为0.75时,距迎头5.5m断面测点的粉尘质量浓度已降至18.9mg/m3以内.
[Abstract]:Aiming at the difficult problem of high dust concentration and difficulty in controlling the dust concentration in fully mechanized driving face of rock roadway, the law of dust pollution in fully mechanized driving face of rock roadway controlled by multi-radial vortex wind is analyzed by means of numerical simulation and field test. The results show that the smaller the air pressure and the ratio of pressure to suction are, the more favorable is the formation of a dust curtain with an axial direction towards the head and uniform wind speed, and the larger the pressure air volume, the smaller the dust diffusion distance above 50 mg / m ~ 3, the smaller the pressure / suction ratio is, the smaller the dust diffusion distance is over 50 mg / m ~ 3, and the smaller the pressure / suction ratio is, the smaller the pressure / suction ratio is. The function relation of the change of pressure air volume and pressure pumping ratio is obtained. When the pressure pumping ratio is 0.75, the dust control curtain is better, the diffusion distance of high mass concentration dust is 3.4 m, and the dust mass concentration of roadheader driver is 19.6 mg / m 3, and it is easy to be applied in the field. The field test results are in good agreement with the numerical simulation results. When the multi-radial vortex wind is used and the pressure pumping ratio is 0.75, the dust mass concentration from the measurement point of 5.5 m cross section to the head of the head has been reduced to 18.9mg/m3.
【作者单位】：山东科技大学矿山灾害预防控制省部共建国家重点实验室培育基地;辽宁工程技术大学煤炭资源安全开采与洁净利用工程研究中心;山东科技大学矿业与安全工程学院;
【基金】：国家自然科学基金煤炭联合重点支持项目(U1261205);国家自然科学基金青年基金项目(51404147) 中国博士后第57批面上一等资助项目(2015M570601) 辽宁工程技术大学煤炭资源安全开采与洁净利用工程研究中心开放基金(LNTU16KF13)
【分类号】：TD714.4

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